# UniPop vs BTTF Clock

The clearest difference is rating: UniPop at 5.0 against BTTF Clock's 4.6. BTTF Clock's advantage is ratings volume (32 vs 4) and device support (4 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UniPop holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: BTTF Clock has 32 ratings behind it against 4, so its average is the more settled of the two.

UniPop ships an update every 3 weeks, BTTF Clock monthly. The most recent releases landed on October 30, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | UniPop | BTTF Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/unipop-app/id6504735990/reviews)** | [4.6 (32 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews) |
| Number of ratings | 4 | **32** |
| Positive reviews | — | 84.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 26 MB | 90 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Carly Googel](https://appshunter.io/developer/1753601086) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### UniPop

[App page](https://appshunter.io/ios/app/unipop-app/id6504735990)

A college-exclusive marketplace for students to buy and sell items like dorm essentials, clothing, and study materials. It facilitates easy local delivery and connects users within their university community.

**Highlights:** Browse and buy college items, Sell dorm items and outfits, Coordinate local delivery, Connect with school community, Track sales and transactions, Secure Stripe dashboard

**In-app purchases:** none


### BTTF Clock

[App page](https://appshunter.io/ios/app/bttf-clock/id6740161583)

Relive the magic of time travel with this app inspired by the DeLorean's dashboard. It features iconic time displays, customizable dates, and authentic sound effects for an immersive experience. Optimized for older devices, it brings cinematic time travel to your phone or tablet.

**Highlights:** Iconic time displays, Customizable dates, Real-time clock, Interactive interface, Authentic sound effects, Car mode with GPS speedometer, Home screen and CarPlay widgets

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is UniPop free?

UniPop is free to download, with no in-app purchases.

### Is BTTF Clock free?

BTTF Clock is free to download, with no in-app purchases.

### Which has better reviews, UniPop or BTTF Clock?

UniPop is rated higher. UniPop averages 5.0 out of 5 from 4 ratings, while BTTF Clock averages 4.6 from 32 ratings.

### Do UniPop or BTTF Clock have ads?

Neither UniPop nor BTTF Clock shows ads.

### Which is updated more often, UniPop or BTTF Clock?

UniPop ships an update every 3 weeks, and BTTF Clock monthly. Most recently, UniPop was updated on October 30, 2026 and BTTF Clock on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*